Ключевые слова: abstract, anatomical, anatomy, art, background, biology, black, body, business, care, clinic, cross, design, filter, flat, graphic, health, healthcare, healthy, hospital, human, icon, illustration, image, internal, internet, isolated, kidney, kidneys, logo, medical, medicine, organ, part, people, physiology, renal, science, shadow, sign, simple, symbol, system, two, ureter, urology, vein, white,